Account of native Thorn. 287 



fourth sort is the species which I have named the Ame- 

 Tican hedge thorn; it has no varieties that ever I have 

 met with, either in the foliage or fruit. The first and 

 the last are the only two haw thorns which I would 

 chuse to plant for live fences, the last however, is pre- 

 ferred by every one that has ever seen my hedges. — 

 Its regular gro^vth, lively foliage, and upright aspect, 

 determines the choice of a spectator at once. It is of 

 free growth, extremely healthy, never infested with the 

 plant louse, and retains its leaves longer than all the 

 others. The plants in my nursery, are now as green 

 as in July, I shall therefore send you some complete 

 specimens of them, root and all, in a preserved ^xy 

 state. ^ 



I remain. Sir, 



Your obedient servant, 



Thomas Main. 

 Dr. James Mease. 



[*The difference in the colour of the American hedge 

 thorn^ when compared with the other specimens, was very 

 apparent, in those sent by Mr. Main to the society. The 

 species named by Mr. M. is the Crataegus Cordata Lin.] 



